Help! 06 crf 450r dies when I twist the throttle?!!

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My 06 crf 450r dies when I give it gas all of a sudden. It kicks over easy and fires right up. It idles fine but when I twist the throttle, even a little it starts back firing and dies. Any help will be much appreciated.

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Thanks so much for the input, I cleaned the carb including the jets, then all the junk accumulated in the slide, and it still did it. The next day I bought a new spark plug and after a few coughs and backfires it cleared up, bike starts on the first kick or so and revs just fine!

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I called Tokyo Mods. He asked if my bike had been sitting for a while, and I said "about a month, whats a while?" and he said, yea 1 month is a while.

He told me to take off the carb and clean the pilot jet, as its probably causing the issue. He also said to take off the subframe on the bike and air cleaner and see if its squiring gas down the back when I add gas.

These are probably my issues, as I put it on in a hurry for the San Felipe 250 in March earlier this year. I will go through it and clean the pilot and take my time putting it back on correctly. We will see if that fixes it.

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I called Tokyo Mods. He asked if my bike had been sitting for a while, and I said "about a month, whats a while?" and he said, yea 1 month is a while.

He told me to take off the carb and clean the pilot jet, as its probably causing the issue. He also said to take off the subframe on the bike and air cleaner and see if its squiring gas down the back when I add gas.

These are probably my issues, as I put it on in a hurry for the San Felipe 250 in March earlier this year. I will go through it and clean the pilot and take my time putting it back on correctly. We will see if that fixes it.

That fixed it. Had to take it apart and clean it. Looked like some buildup below the floats. Cleaned everything with Carb cleaner and put it back together. Forgot to tighten the drain screw all the way and the bike started leaking gas like crazy. Took it all back down (3 times) only to find the screw needed to be tightened all the way in.

Bike works great. Its tought to find a high enough idle to elimate bog when I snap the throttle and still have low RPMS to slow the engine going downhill on trails. Just keeping the idle low for now.